#include<iostream>
#include<string>
#include<unistd.h>
#include<pthread.h>

int tickets=1000;

pthread_mutex_t mutex=PTHREAD_MUTEX_INITIALIZER;//互斥锁
pthread_cond_t cond=PTHREAD_COND_INITIALIZER;//条件变量

void* start_routine(void* args)
{
    std::string name=static_cast<const char*>(args);
    while(true)
    {
        pthread_mutex_lock(&mutex);
        pthread_cond_wait(&cond,&mutex);
        std::cout<<name<<"->"<<tickets<<std::endl;
        tickets--;
        pthread_mutex_unlock(&mutex);
    }
}

int main()
{
    //通过条件变量控制线程的执行
    pthread_t t[5];
    for(int i=0;i<5;++i)
    {
        char* name=new char[64];
        snprintf(name,64,"thread %d",i+1);
        pthread_create(t+i,nullptr,start_routine,name);
    }


    while(true)
    {
        sleep(1);
        //pthread_cond_signal(&cond);
        pthread_cond_broadcast(&cond);

        std::cout<<"main thread wakeup one thread..."<<std::endl;
    }

    for(int i=0;i<5;++i)
    {
        pthread_join(t[i],nullptr);
    }

    return 0;
}